scikit-hep/particle: 0.8.0

Changes in API: GeantID class renamed to Geant3ID. Data CSV files: Version 3 (and 2) of package data files, which contain new entries and fixes for certain information in 2008 PDG extended data file. File data/pdgid_to_geantid.csv renamed to data/pdgid_to_geant3id.csv. 2016 and 2017 PDG data files mass_width_2016.mcd and mass_width_2017.mcd removed. Tests: Tests for converters submodule added. Tests for Geant3ID extended. Miscellaneous: Package files formatted with Black package